CN217579798U - Prefabricated bent cap high accuracy mounting structure - Google Patents

Abstract

The utility model provides a prefabricated bent cap high accuracy mounting structure relates to construction technical field. The device comprises a supporting system, wherein the supporting system comprises a temporary support and an operating platform arranged on the temporary support, a through hole for a pier stud to pass through is formed in the operating platform, adjusting sand boxes are arranged on two sides of the operating platform, and the adjusting sand boxes are arranged corresponding to slopes of a cover beam; a plurality of bent cap reference control points are calibrated on the operating platform, and the bent cap reference control points comprise a transverse center line at the bottom of the bent cap, an upper edge control point of the center line and a longitudinal edge control point of the bent cap; the upper edge control points of the center line are positioned at two ends of the transverse center line of the bottom of the bent cap, and the longitudinal edge control points of the bent cap are positioned at the side edges of the transverse center line of the bottom of the bent cap. Through bent cap benchmark control point, the elevation of each datum point when the bent cap is installed is checked, and the bent cap installation accuracy can be accurately ensured.

Description

Prefabricated bent cap high accuracy mounting structure

Technical Field

The utility model relates to a construction technical field particularly, relates to a prefabricated bent cap high accuracy mounting structure.

Background

In recent years, a fully prefabricated assembly type bridge system is formed by gradually covering bridge pier structures at the lower part of a bridge from the initial stage of only aiming at the upper part structure of the bridge to the subsequent stage of only aiming at the lower part structure of the bridge, and the development is rapid and has not been achieved. The capping beam is used as a key component of a bridge lower structure, is connected with a lower upright post through a grouting metal corrugated pipe and can be divided into an integral capping beam and a segmental capping beam according to the bridge deck span, and after the segmental capping beam is connected with the upright post, a segmental wet joint needs to be poured and prestress is applied to form a whole.

As a prefabrication and assembly process, the requirement on the manufacturing and installation precision of components is high, according to the requirement of 'assembly type urban bridge engineering specifications', the allowable deviation of the geometrical dimension of the bent cap reaches +/-5 mm, the position deviation of the center lines of the pre-embedded grouting corrugated pipe and the reserved dowel bars is 2-3 mm, the allowable deviation of the staggering among adjacent sections and the height difference of the top surface seam is 3mm after the bent cap is installed, the allowable deviation of the axis of the upper support is 3mm, the key problem needs to be solved for ensuring the manufacturing and installation precision, and for ensuring the installation precision, a bent cap installation construction method based on a three-dimensional measurement lofting technology is proposed, wherein a three-dimensional laser scanner is used for scanning the appearance and the appearance of the bent cap of the upright post and 3D modeling are firstly carried out, then virtual preassembling is carried out on a cloud system, then a special climbing device and a lofting robot are arranged on site, and the integral installation precision of the bent cap is controlled according to the preassembling coordinates of the cloud system; still someone realizes the bent cap installation location through setting up bent cap roof beam body guide way and stand hoop positioner; the former needs to be additionally provided with a three-dimensional laser scanner, a cloud system, a special climbing device, a lofting robot and other equipment, so that on one hand, the cost is high, on the other hand, the requirement of the corresponding equipment on the operation level of a human is high, and the universality of the current stage is weak; in the latter, because the guide groove is additionally arranged on the bent cap, the attractive structure is influenced, time and labor are wasted, and the operation is not convenient; so, for improving the efficiency of construction, practice thrift the cost, guarantee the installation accuracy, improve construction quality, the utility model provides a be applied to the mounting structure of bent cap.

Therefore, in view of the deficiencies of the prior art, it is desirable to provide a high precision mounting structure for a prefabricated cover beam that solves the problems set forth above in the background art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a prefabricated bent cap high accuracy mounting structure, it can be to the weak point among the prior art, proposes the solution, has can accurate assurance bent cap installation accuracy, improves efficiency of construction and construction quality, practices thrift characteristics such as construction cost.

The embodiment of the utility model provides a high accuracy mounting structure of prefabricated bent cap, including the support system who is used for installing the bent cap, the support system includes interim support and installs in operation platform on the interim support, set up the through-hole that is used for the pier stud to pass on the operation platform, the both sides of operation platform are equipped with the regulation sand box, the regulation sand box corresponds the set up of rising of bent cap;

a plurality of bent cap reference control points are calibrated on the operating platform, and the bent cap reference control points comprise a transverse center line at the bottom of a bent cap, an upper edge control point of the center line and a longitudinal edge control point of the bent cap; the upper edge control points of the center line are positioned at two ends of the transverse center line of the bottom of the cover beam, the longitudinal edge control points of the cover beam are positioned at the side edges of the transverse center line of the bottom of the cover beam, and the transverse center line of the bottom of the cover beam, the upper edge control points of the center line and the longitudinal edge control points of the cover beam are calibrated respectively according to the size of the cover beam.

In some embodiments of the present invention, the central line upper edge control points include two, and the two control points respectively correspond to two ends of the cover beam of one segment; the number of the longitudinal edge control points of the cover beam is four, and the longitudinal edge control points are respectively arranged corresponding to the end parts of the two side edges of the cover beam of one segment.

In some embodiments of the present invention, the base height of the cap beam is marked with the height control point of the grout blocking plate.

In some embodiments of the present invention, the height control point of the grout baffle is installed on the top of the pier stud.

The utility model discloses an in some embodiments, be equipped with a plurality of regulation cushions in the fender, fender top surface elevation exceeds regulation cushion top surface elevation certain distance.

In some embodiments of the utility model, adjust the cylindric steel cylinder that the sand box is built-in fine sand, be equipped with concrete or steel buttress on the fine sand, the side bottom of adjusting the sand box is offered and is used for releasing the opening and shutting mouth of fine sand.

The utility model discloses an in some embodiments, it is provided with two sets of, two sets of to adjust sand box parallel arrangement and be in the outside of pier stud, every group includes two adjust the sand box.

In some embodiments of the present invention, the temporary support comprises a plurality of support frames and a plurality of i-steel beams arranged at the top of the support frames, and the support frames comprise a plurality of columns and a cross brace and a diagonal brace arranged between the columns.

In some embodiments of the present invention, the operation platform is a plurality of splice boards laid on the i-steel beam.

The utility model discloses an in some embodiments, be equipped with a plurality of bellows in the bent cap, the slip casting entry of bellows is located the top of bent cap, the bottom of bent cap is equipped with a plurality of slip casting pipes, the slip casting pipe to the inside extension of bent cap, the outside of slip casting pipe is equipped with the control valve.

Compared with the prior art, the embodiment of the utility model has following advantage or beneficial effect at least:

the utility model discloses a support system for installing the bent cap, the support system includes interim support and installs in the operation platform on the interim support, set up the through-hole that is used for the pier stud to pass on the operation platform, the both sides of operation platform are equipped with the regulation sand box, the regulation sand box corresponds the slope setting of bent cap; the operation platform is calibrated with a plurality of bent cap reference control points, and the bent cap reference control points comprise a bent cap bottom transverse central line, a central line upper edge control point and a bent cap longitudinal edge control point; the top edge control points of the center line are positioned at two ends of the transverse center line of the bottom of the cover beam, the longitudinal edge control points of the cover beam are positioned at the side edges of the transverse center line of the bottom of the cover beam, and the transverse center line of the bottom of the cover beam, the top edge control points of the center line and the longitudinal edge control points of the cover beam are calibrated according to the size of the cover beam. Through fender elevation control point and bent cap benchmark control point that bent cap end elevation and bent cap size were markd, the elevation of each datum point when verifying the bent cap installation and ensure that the horizontal position of bent cap is accurate, accomplish the accurate installation of bent cap, it is popular and easy to understand, it is simple convenient, grasp easily, need not to add other extra assistance, need not to increase all the other costs, and can accurate assurance bent cap installation accuracy, for assembled bridge bent cap installation control provides useful reference, have popularization and application value.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on these drawings without inventive efforts.

Fig. 1 is a schematic view of a mounting structure of a bent cap according to an embodiment of the present invention;

FIG. 2 is a top view of a support system according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a pier stud according to an embodiment of the present invention;

fig. 4 is a schematic view of a layout of calibration of the reference control points of the bent cap according to the embodiment of the present invention;

fig. 5 is a schematic distribution diagram of the bellows and the grouting pipe in the embodiment of the present invention;

fig. 6 is a schematic view of a connection structure between the capping beam and the pier stud according to an embodiment of the present invention.

Reference numerals: 1. a capping beam; 2. a support system; 200. an operating platform; 210. temporarily supporting; 211. a column; 212. a cross brace; 213. bracing; 214. a base plate; 3. pier studs; 4. adjusting the cushion block; 5. adjusting the sand box; 6. elevation control points of the pulp baffles; 7. the transverse center line of the bottom of the bent cap; 8. an edge control point on the central line; 9. capping beam longitudinal edge control points; 10. a grouting pipe; 11. a bellows; 12. wet seaming; 13. a baffle plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, the description is only for convenience of description of the present invention and simplification, but the indication or suggestion that the device or element to be referred must have a specific position, be constructed and operated in a specific position, and therefore, the present invention should not be construed as being limited thereto. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not require that the components be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present invention, "a plurality" means at least 2.

In the description of the embodiments of the present invention, it should be further noted that unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Examples

As shown in fig. 1 to 6, fig. 1 is a schematic view illustrating a mounting structure of a bent cap according to an embodiment of the present invention; FIG. 2 is a top view of a support system according to an embodiment of the present invention; fig. 3 is a schematic structural view of a pier stud according to an embodiment of the present invention; fig. 4 is a schematic view of a layout of calibration of the reference control points of the bent cap according to the embodiment of the present invention; fig. 5 is a schematic distribution diagram of the bellows and the grouting pipe in the embodiment of the present invention; FIG. 6 is a schematic view of a connection structure between a capping beam and a pier stud according to an embodiment of the present invention;

the embodiment of the application provides a high-precision prefabricated cover beam mounting structure, which comprises a supporting system 2 for mounting a cover beam 1, wherein the supporting system 2 comprises a temporary support 210 and an operating platform 200 mounted on the temporary support 210, a through hole for allowing a pier stud 3 to pass through is formed in the operating platform 200, adjusting sand boxes 5 are arranged on two sides of the operating platform 200, and the adjusting sand boxes 5 are arranged corresponding to the rising slopes of the cover beam 1;

a plurality of bent cap reference control points are calibrated on the operating platform 200, and the bent cap reference control points comprise a bent cap bottom transverse central line 7, a central line upper edge control point 8 and a bent cap longitudinal edge control point 9; the center line upper edge control points 8 are located at two ends of a horizontal center line 7 at the bottom of the cover beam, the cover beam longitudinal edge control points 9 are located on the side edge of the horizontal center line 7 at the bottom of the cover beam, and the horizontal center line 7 at the bottom of the cover beam, the center line upper edge control points 8 and the cover beam longitudinal edge control points 9 are calibrated respectively according to the size of the cover beam 1.

The utility model comprises a supporting system 2 for installing the bent cap 1, wherein the supporting system 2 comprises a temporary support 210 and an operating platform 200 arranged on the temporary support 210, a through hole for the pier stud 3 to pass through is arranged on the operating platform 200, adjusting sand boxes 5 are arranged on two sides of the operating platform 200, and the adjusting sand boxes 5 are arranged corresponding to the rising slope of the bent cap 1; a plurality of bent cap reference control points are calibrated on the operating platform 200, and the bent cap reference control points comprise a bent cap bottom transverse central line 7, a central line upper edge control point 8 and a bent cap longitudinal edge control point 9; the center line upper edge control points 8 are located at two ends of a transverse center line 7 at the bottom of the cover beam, the cover beam longitudinal edge control points 9 are located on the side edge of the transverse center line 7 at the bottom of the cover beam, and the cover beam bottom transverse center line 7, the center line upper edge control points 8 and the cover beam longitudinal edge control points 9 are calibrated according to the size of the cover beam 1. Through the 1 end elevation of bent cap and 1 size of bent cap fender elevation control point 6 and bent cap benchmark control point of bent cap 1 mark, the elevation of each datum point when checking the bent cap 1 installation and ensure that the horizontal position of bent cap 1 is accurate, accomplish the accurate installation of bent cap 1, popular and easy understand, it is simple convenient, grasp easily, need not to add other extra assistance, need not to increase all the other costs, and can accurate assurance bent cap 1 installation accuracy, for 1 installation control of assembled bridge bent cap provide useful reference, have popularization and application value.

Next, a high-precision mounting structure of a prefabricated cover beam in the present exemplary embodiment will be further described.

In an embodiment of the present invention, the supporting system 2 includes a temporary support 210 and an operation platform 200 installed on the temporary support 210.

As an example, the temporary support 210 includes a plurality of sets of support frames and a plurality of i-beam cross beams disposed on the top of the support frames, the support frames include a plurality of vertical columns 211, and cross braces 212 and diagonal braces 213 disposed between adjacent vertical columns 211, and the bottom of the vertical column 211 is provided with a backing plate 214; specifically, the group of support frames includes four vertical columns 211, a cross brace 212 and an inclined brace 213 are arranged between two adjacent vertical columns 211, the four vertical columns 211 form a rectangular support frame, it should be noted that the group number and the fixing position of the support frames are determined according to the actual load of the bent cap 1, and two pier studs 3 are arranged between every two groups of support frames; the operation platform 200 is formed by a plurality of spliced wood boards laid on an i-steel beam, and it should be noted that gaps need to be reserved except observation points arranged at the positions of the pier stud 3 and the end of the bent cap 1, and other positions are all paved by using the wood boards, so that the construction safety in the construction process is ensured.

The utility model discloses an in the embodiment, above-mentioned operation platform 200's both sides are equipped with the regulation sand box 5, adjust the slope setting that sand box 5 corresponds bent cap 1 for adjust bent cap 1's elevation, guarantee that bent cap 1's slope is accurate.

As an example, the adjusting sand boxes 5 are arranged in two groups, two groups of adjusting sand boxes 5 are arranged at the outer side of the pier stud 3 in parallel, and each group has two, and four in total, it should be noted that generally, four adjusting sand boxes 5 are two by two flush, and two on the left side are flush, and the specific elevation is determined according to the slope rising elevation of the left side bent cap (related to the position of the adjusting sand box 5 and the slope rising elevation of the lower part of the bent cap 1), or the estimated shrinkage of sand bodies in the adjusting sand boxes 5 can be designed to be slightly higher than the required elevation; the four adjusting sand boxes 5 are flush when the left and right slope slopes are the same as the positions of the adjusting sand boxes 5, and the adjusting sand boxes 5 are used for adjusting the elevation of the cover beam 1; the adjusting sand box 5 is a cylindrical steel cylinder with built-in fine sand, concrete or steel buttresses are arranged on the fine sand, and an opening and closing opening used for releasing the fine sand is formed in the bottom of the side face of the adjusting sand box 5. The fine sand is released through the opening and closing port, and the concrete or the steel buttress sinks, so that the purpose of adjusting the elevation of the capping beam 1 is achieved.

In an embodiment of the present invention, a plurality of lid beam reference control points are calibrated on the operating platform 200, and the lid beam reference control points include a lid beam bottom transverse center line 7, a center line upper edge control point 8, and a lid beam longitudinal edge control point 9; the center line upper edge control points 8 are located at two ends of a transverse center line 7 at the bottom of the cover beam, the cover beam longitudinal edge control points 9 are located on the side edge of the transverse center line 7 at the bottom of the cover beam, and the cover beam bottom transverse center line 7, the center line upper edge control points 8 and the cover beam longitudinal edge control points 9 are calibrated according to the size of the cover beam 1.

As an example, the central line upper edge control points 8 include two, which are respectively arranged at two ends of the cover beam 1 corresponding to one segment; the bent cap longitudinal edge control points 9 comprise four, which are respectively arranged corresponding to the end parts of two side edges of the bent cap 1 of one segment.

In an embodiment of the present invention, the slurry blocking plate height control points 6 are marked on the sides of the pier studs 3 according to the bottom elevation of the bent cap 1. The grout baffle 13 is arranged at the top of the pier stud 3 according to the grout baffle elevation control points 6. A plurality of adjusting cushion blocks 4 are arranged in the pulp baffle 13, and the top surface elevation of the pulp baffle 13 is higher than that of the adjusting cushion blocks 4 by a certain distance. It should be noted that the adjusting cushion block 4 is used for ensuring the elevation of the splicing position, the height of the sand box 5 is adjusted to ensure the controllable overall elevation of the bent cap 1, meanwhile, in order to ensure the full slurry of the mortar cushion layer at the splicing position of the pier stud 3 and the bent cap 1, the elevation of the top surface of the slurry baffle 13 can be slightly higher than that of the top of the adjusting cushion block 4, the slurry baffle 13 automatically moves downwards to be level with the cushion block by means of the dead weight of the bent cap 1, and the elevation of the bottom of the slurry baffle 13, the cushion block and the bent cap 1 is kept consistent with the horizontal plane.

The utility model discloses an in the embodiment, be equipped with a plurality of bellows 11 in above-mentioned bent cap 1, the slip casting entry of bellows 11 is located bent cap 1's top, and bent cap 1's bottom is equipped with a plurality of slip casting pipes 10, and slip casting pipe 10 extends to bent cap 1 is inside, and the outside of slip casting pipe 10 is equipped with the control valve, closes and opens the slip casting through the control valve.

The utility model discloses 1 high accuracy mounting structure of bent cap's specific installation work progress as follows: the temporary supports 210 and the operation platform 200 are erected, and the adjusting sand boxes 5 are arranged on the operation platform 200 according to the elevation adjusting requirements of the cover beam 1. Wherein, above-mentioned bent cap 1 regulation demand specifically does, need to ensure the bottom pier stud 3 position level of bent cap 1 after adjusting sand box 5 adjustment to and the rise elevation accuracy of bent cap 1 both sides.

Calibrating a height control point 6 of the grout baffle on the pier stud 3 according to the bottom elevation of the bent cap 1; wherein, the height control points 6 of the grout baffle are respectively marked on the periphery of the pier stud 3, namely on the outer sides of the pier stud 3 in four directions and are positioned on the same horizontal line, so that the grout baffle 13 is kept horizontal after being installed. The height control points 6 of the grout baffle are used for installing the grout baffle 13, so that the height installation accuracy of the grout baffle 13 is guaranteed, and the height accuracy of the bent cap 1 when the bent cap falls to the pier stud 3 is further guaranteed.

And calibrating a transverse center line 7 at the bottom of the bent cap, an upper edge control point 8 of the center line and a longitudinal edge control point 9 of the bent cap on the I-shaped steel beam of the support system 2 of the bent cap 1 according to the size of the bent cap 1. Specifically, the position of a transverse center line 7 at the bottom of the cover beam is determined according to the length of a transverse bridge and the length of a longitudinal bridge of the cover beam 1, an upper edge control point 8 of the center line and a longitudinal edge control point 9 of the cover beam are determined according to the lengths, and the height and the horizontal position of the cover beam 1 during installation are verified correspondingly and calibrated on the I-shaped steel cross beam.

And sequentially placing a grout baffle 13 and an adjusting cushion block 4 according to the grout baffle elevation control point 6, verifying the elevation of the bent cap 1, performing initial hoisting on the bent cap 1, and performing grout setting after the initial hoisting is completed. Specifically, a pulp baffle 13 is arranged on the edge of the pier stud 3 according to a pulp baffle elevation control point 6, and a plurality of adjusting cushion blocks 4 are arranged on the top of the pier stud 3; the number of the adjusting cushion blocks 4 is preferably 4, the 4 adjusting cushion blocks 4 are arranged at intervals, and the top surface elevation of the pulp baffle 13 is higher than that of the adjusting cushion blocks 4 by a certain distance. It should be noted that the adjusting cushion block 4 is used for ensuring the elevation of the splicing position, the height of the sand box 5 is adjusted to ensure that the overall elevation of the bent cap 1 is controllable, meanwhile, in order to ensure that the mortar cushion at the splicing position of the pier stud 3 and the bent cap 1 is full, the elevation of the top surface of the mortar baffle 13 can be slightly higher than that of the top of the adjusting cushion block 4, the mortar baffle 13 automatically moves downwards to be level with the cushion block by means of the dead weight of the bent cap 1, and the elevation of the bottoms of the mortar baffle 13, the cushion block and the bent cap 1 is kept consistent with the horizontal plane.

And (3) placing the bent cap 1 on the pier stud 3 and the adjusting sand box 5, adjusting the elevation of the adjusting sand box 5, and checking the transverse bridge direction elevation of the bent cap 1 and the longitudinal bridge direction elevation of the bent cap 1 to finish the initial test hoisting of the bent cap 1. Specifically, after data such as the size of the cover beam 1 in the early stage, the positions of a plurality of datum control points, the elevation of the adjusting sand box 5 and the like are rechecked to be correct, the cover beam 1 is initially lifted, a lifting machine is used for lifting and moving the cover beam 1, the bottom grouting corrugated pipe 11 of the cover beam is aligned to the reserved steel bar on the upper portion of the pier stud 3 and then is stably and slowly lowered, after the stress of the adjusting cushion block 4 is stabilized, the crane is slowly unloaded, the elevation of the adjusting sand box 5 is adjusted by releasing fine sand, after adjustment, whether the transverse bridge direction elevation of the cover beam 1 and the longitudinal bridge direction elevation of the cover beam 1 are accurate or not is verified by mutually matching a horizontal ruler, a tower ruler, a leveling instrument and the like, so that the transverse bridge direction slope rising of the cover beam 1 is accurate, the longitudinal bridge direction bottom elevation is accurate, and the elevation control tolerance is +/-3 mm.

And (3) installing a grout stop pad on a reserved steel bar of the pier stud 3, carrying out grout sitting, grouting into the grout baffle 13, and troweling, wherein the elevation of the grout surface is consistent with that of the built-in adjusting cushion block 4 and is slightly higher than the adjusting cushion block 4. Specifically, after the elevation of the bent cap 1 is verified to be correct, the bent cap 1 is lifted away, a grout stop pad is installed on a reserved steel bar of the pier stud 3, grout is set, high-strength non-shrinkage mortar is adopted for setting, the mortar is poured into the grout baffle 13 after being stirred, and the setting is finished.

And (4) finishing the trial hoisting of the bent cap 1, and formally installing the bent cap 1 in place after finishing the grouting. Moving the bent cap 1 to a preset distance position above the adjusting cushion block 4; wherein the preset distance is 1cm-2cm. It should be noted that the bent cap 1 is moved to a position 1cm to 2cm above the adjusting cushion block 4 and then stopped, and the horizontal position of the bent cap 1 is checked and adjusted to ensure that the falling position of the bent cap 1 is accurate.

And verifying and adjusting the front, rear, left and right positions of the bent cap 1 according to a transverse center line 7 at the bottom of the bent cap, an upper edge control point 8 of the center line and a longitudinal edge control point 9 of the bent cap respectively. Specifically, the longitudinal bridge direction center position and the transverse bridge direction edge position inside the bent cap 1 are verified according to the inner side center line upper edge control point 8, and the longitudinal bridge direction center position and the transverse bridge direction edge position outside the bent cap 1 are verified according to the outer side center line upper edge control point 8; and (3) checking the position of the inner longitudinal bridge edge of the bent cap 1 according to the inner longitudinal edge control point 9 of the bent cap, and checking the position of the outer longitudinal bridge edge of the bent cap 1 according to the outer longitudinal edge control point 9 of the bent cap. Wherein, the inboard is the seam one side of segmentation bent cap, and the outside then is the opposite side of segmentation bent cap seam side, whether the both ends center and the both ends edge position of confirming bent cap 1 respectively promptly are aligned with bent cap benchmark control point, if not then finely tune according to bent cap benchmark control point, ensure that the horizontal position of bent cap 1 is accurate, and the whereabouts position is accurate.

And after checking and determining, vertically dropping the cover beam 1. Specifically, the capping beam 1 is moved slowly by using a hoisting machine, the grouting sleeve is aligned with the reserved steel bars of the pier stud 3 and falls stably, and when the distance between the grouting sleeve and the adjusting cushion block 4 is about 1-2 cm, the front position, the rear position, the left position and the right position of the plane of the capping beam 1 are checked by using a hanging hammer and combining a center line control point and an edge control point which are arranged in front of the hanging hammer, so that the accuracy of the horizontal position of the capping beam 1 is ensured, and the deviation allowable error of the axis is +/-2 mm. And if the installation is wrong, fine adjustment is carried out to align the cover beam, the cover beam 1 is vertically moved downwards after the error is confirmed, the crane is unloaded after the cover beam 1 is stably fallen, the installation datum point and related data of the cover beam 1 are rechecked, and the sling is taken down after the error is confirmed to complete the installation of the cover beam 1.

Carrying out mortar cushion curing on the installed bent cap 1 for 24 hours, and then grouting the corrugated pipe 11, wherein two grouting modes are adopted according to the difference of the positions of the corrugated pipe 11 on the bent cap spine or the bases on the two sides of the bent cap spine, and when the corrugated pipe 11 is positioned on the bases on the two sides of the bent cap spine, grouting is directly carried out from the corrugated pipe extending opening on the upper part of the bent cap 1 to the inside; when the other corrugated pipe 11 is positioned at the top of the bent cap ridge and can not extend out, grouting (grouting) is carried out through the grouting pipe 10 and a matched grouting pipe, wherein the grouting pipe is positioned at the top of the bent cap 1 and is arranged corresponding to the grouting pipe 10 at the bottom, the grouting can be carried out in two steps according to actual conditions, the grouting pipe 10 in the first step is used for grouting upwards from the bottom of the bent cap 1, the grouting pipes 10 are arranged at two sides of the pier stud 3, eight side of the pier stud, six side of the pier stud, the corrugated pipe 11 in the second step is arranged in the bent cap 1, the upper top surface of the bent cap 1 is provided with an inlet of the corrugated pipe 11, nine side of the pier stud, and eighteen side of the pier stud, grouting is started from the corrugated pipe 11 at the upper part, and grouting is finished; binding reinforcing steel bars and pouring concrete to the wet joints 12 among the multiple sections of bent caps 1, and removing the formwork for maintenance after pouring is finished; and after the maintenance is finished, prestress tensioning is carried out, so that the multiple sections of bent caps 1 are connected into a whole.

The utility model discloses a 1 mounting structure of bent cap, popular easy to understand, it is simple convenient, grasp easily, need not to add other extra assistance, need not to increase all the other costs, and can accurate assurance bent cap 1 installation accuracy, for 1 installation control of assembled bridge bent cap provides useful reference, have popularization and application and worth.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The prefabricated bent cap high-precision mounting structure is characterized by comprising a supporting system for mounting a bent cap, wherein the supporting system comprises a temporary support and an operating platform mounted on the temporary support, a through hole for a pier column to pass through is formed in the operating platform, adjusting sand boxes are arranged on two sides of the operating platform and correspond to the rising slopes of the bent cap;

a plurality of bent cap reference control points are calibrated on the operating platform, and the bent cap reference control points comprise a transverse center line at the bottom of a bent cap, an upper edge control point of the center line and a longitudinal edge control point of the bent cap; the upper edge control points of the center line are positioned at two ends of the transverse center line of the bottom of the cover beam, the longitudinal edge control points of the cover beam are positioned at the side edges of the transverse center line of the bottom of the cover beam, and the transverse center line of the bottom of the cover beam, the upper edge control points of the center line and the longitudinal edge control points of the cover beam are calibrated respectively according to the size of the cover beam.

2. The prefabricated bent cap high-precision mounting structure of claim 1, wherein the number of the central line upper edge control points is two, and the two central line upper edge control points are respectively arranged at two ends of the bent cap corresponding to one segment; the longitudinal edge control points of the cover beam comprise four, and the longitudinal edge control points are arranged corresponding to the end parts of two side edges of the cover beam of one segment respectively.

3. The high-precision prefabricated cover beam mounting structure of claim 1, wherein a slurry baffle elevation control point is marked on the periphery of the pier column according to the bottom elevation of the cover beam.

4. The prefabricated cover beam high-precision mounting structure of claim 3, wherein a slurry baffle is mounted on the top of the pier column according to the slurry baffle elevation control points.

5. The high-precision installation structure of the prefabricated cover beam according to claim 4, wherein a plurality of adjusting cushion blocks are arranged in the slurry baffle, and the top surface of the slurry baffle is higher than the top surface of each adjusting cushion block by a certain distance.

6. The high-precision prefabricated cover beam mounting structure of claim 1, wherein the adjusting sand box is a cylindrical steel cylinder with fine sand inside, concrete or steel buttresses are arranged on the fine sand, and an opening and closing opening for releasing the fine sand is formed in the bottom of the side face of the adjusting sand box.

7. The high-precision prefabricated cover beam mounting structure according to claim 1, wherein the adjusting sand boxes are arranged in two groups, the two groups of adjusting sand boxes are arranged on the outer sides of the pier columns in parallel, and each group comprises two adjusting sand boxes.

8. The high-precision prefabricated cover beam mounting structure according to claim 1, wherein the temporary support comprises a plurality of groups of support frames and a plurality of I-shaped steel cross beams arranged at the tops of the support frames, and each support frame comprises a plurality of upright columns and cross braces and inclined braces arranged between the adjacent upright columns.

9. The high-precision prefabricated cover beam mounting structure of claim 8, wherein the operating platform is a plurality of spliced wood boards laid on the I-steel cross beam.

10. The prefabricated bent cap high-precision mounting structure of claim 1, wherein a plurality of corrugated pipes are arranged in the bent cap, grouting inlets of the corrugated pipes are located at the top of the bent cap, a plurality of grouting pipes are arranged at the bottom of the bent cap and extend towards the inside of the bent cap, and control valves are arranged outside the grouting pipes.

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